tempnam Create file with unique file name &reftitle.description; stringtempnam stringdir stringprefix Creates a file with a unique filename, with access permission set to 0600, in the specified directory. If the directory does not exist or is not writable, tempnam may generate a file in the system's temporary directory, and return the full path to that file, including its name. &reftitle.parameters; dir The directory where the temporary filename will be created. prefix The prefix of the generated temporary filename. Windows uses only the first three characters of prefix. &reftitle.returnvalues; Returns the new temporary filename (with path), or &false; on failure. &reftitle.examples; ]]> &reftitle.notes; If PHP cannot create a file in the specified dir parameter, it falls back on the system default. On NTFS this also happens if the specified dir contains more than 65534 files. &reftitle.seealso; tmpfile sys_get_temp_dir unlink